[gnome-calculator] Fix option list not being null terminated

[Robert Ancell <rancell src gnome org>]

commit 6571a6cc8cca2dcd0c1de9dbe470207a10486a4e
Author: Robert Ancell <robert ancell canonical com>
Date:   Mon Dec 3 16:54:02 2012 +1300

    Fix option list not being null terminated

 src/gnome-calculator.vala |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/src/gnome-calculator.vala b/src/gnome-calculator.vala
index af22c37..dfdbc43 100644
--- a/src/gnome-calculator.vala
+++ b/src/gnome-calculator.vala
@@ -294,7 +294,7 @@ public class Calculator : Gtk.Application
 
         program_name = Path.get_basename (args [0]);
 
-        var options = new OptionEntry [3];
+        var options = new OptionEntry [4];
 
         string? solve_equation = null;
         options[0] = {"solve",
@@ -321,6 +321,8 @@ public class Calculator : Gtk.Application
                       ref show_version,
                       _("Show release version"),
                       null};
+                      
+        options[3] = { null, 0, 0, 0, null, null, null };
 
         try
         {